Supporting attachment for lathes



April 21, 1931. w. w. BULIFANT 1,801,719

SUPPORTING ATTACHMENT FOR LATHES Filed Dec. 10, 1929 1 eludes means for centering'orpositioning the grooves. Mounted substantially centrally 61) work piece having a central countersunk porscribed. The head or plate 12 is secured to B 50 of this invention. According to Figures 1 ,rior face of the head 12. Assoon as the work 100 Patented Apr. 21, 1931' p i 1 i i IIU TED STATE; PATENT OFFICE ILLIAM w BULIFANT, or MIAMI, FLORIDA sUrronTme ATTACHMENT FOR LATHES Application liledDecember 10, 1929. Serial No. 412,994.

I This-invention relates to fixtures or attach 2, 3, 4 and 5, the attachment comprises a head 'ments for lathes or turning machines. More or face plate 12 and a centering member or particularly, it-has to dowithattachments for washer 17 p supporting a work piece having a counter- The head or face plate 12 in the form 5 sunk portion such as a fly-wheel'in properly shown, is cylindrical in shape, and is pi'o- 5'5 alignedposition upon the driving head of a vlded with a plurality of large holes extendlathet r in hin mg therethrough and suitably spaced from A bj t f'th i ntion 1 1 id each other. 7 The holes adjacent the exterior supporting fixture or attachment which inface of the plate are out away SO 51 8-120 fOI m work piece in proper alignment upon said fixof the exterior face of the plate is a ring tu o tta h t, which pro ects beyond said face.v The exte- Anoth r obj t of th i ve ti n i to prorlor face of the'plate 12 is also provide'dwith vide a fixture or attachment for supporting a a small hole for the purpose hereinafter detion which includes a centering or aligning the driving head 11 by means of the headed means of such construction as to snugly inter bolts 13, the bolts passing through the large fit the countersunk portion. holes in the head or plate 12. r V A further object of the invention is to proi The Work piece 16 in the construction i 20 vide a fixture or attachment for supporting a own, is a fly-Wheel havinga central counwork piece having a central countersunk portersunk portlon. Mounted within the countion in which the centering or aligning means tersunk portion is a centering member or may be varied so as to accommodate ccunter- Washer 17 Which is of such Width and diam; sunk portions of workpieces of different sizes. e'ter as to snugly interfit' said countersunk Other important objects of the invention portion. The size of the centering member will be explained in the following detailed or washer 17 maybe varied depending upon description and all features are illustrated in the size of the countersunk portion of the the accompanying drawings wherein similar work piece 16. The centering member 17 is reference numerals designate corresponding provided With a central opening. Boththe parts in the several figures and wherem: fly-wheel and the centering member or wash- 8'! Figure 1 is a side elevation of a lathe shower 17 are provided with a small hole for the ing the attachment of this invention used in purpose hereinafterdescrlbed. a connection therewith. In assembling the work piece 16 upon the V Figure 2 is a face View of the head or face fixture or attachment a centering member or plate which is adapted to be secured to the Washer 17 of such width and diameter as to driving head of the lathe; snugly interfit the countersunk portion of Figure 3 is a side view of the head or face the work piece is inserted within said counplate shown in Figure 2. tersunk portion. The centering member or Figure 4 is a face view of the centering washer 17 is so arranged within the counterwasher. I sunk portion of the work piece" 16 that the Figure 5 is aside view of the centering small holes in the work pieceand centering washer shown in Figure 4. member are in direct alignment. A dowel Figure 6 is a side view showing a modificapin 18 is then inserted in the small hole of tion of the fixture or attachment of this inthe centering member 17. The work piece 45 vention. 16 is then placedin contact Withthe head 12 Referring to the drawings 1 designates in such manner that the central opening of the driving member'or spindle of a lathe the centering member 17 surroundsthe ring which carries a driving head 11 to the face of 15 of the head 12, and that the dowel pin 18 which is secured the fixture or attachment will. engage withthe small hole in the extepiece 16 is mounted upon the head 12, the lock plate 20 of the tail stock 21 which is in retracted position is advanced by the usual means so as to cause it to engage the face of the work piece 16 and hold it securely upon the head 12 of the driving member 11.

The tail stock 21 comprises a lock plate 20 and a tail stock center 24. The movement of the tail stock center relative to the lock plate 20 causes the lock plate to be moved into engagement with the work piece 16. As the tail stock 21 is of the usual construction no detailed description appears to be necessary.

In the form shown in Figure 6 the fixture or attachment of this invention comprises a head cylindrical in shape 30 which is adapted to be mounted upon the driving member 1 of a lathe. The cylindrical head 30 has a reduced portion 31 provided with a centrally threaded opening 32. The face opposite the reduced portion 31 of the head 30 is provided with a plurality of threaded holes'33. Projecting centrally from the face of the cylindrical member 30 is a centering member or washer 35. This centering member or washer 35 is of such width and diameter as to snugly interfit the countersunk portion of the work piece which is to be mounted thereon.

The work piece 16 in the form of a fly wheel having a centrally countersunk portion is mounted upon the cylindrical head 30 in such manner that the centering member 35 snugly interfits the countersunk portion of the fiy-wheel. The work piece 16 is secured to the cylindrical head 30 by means of suitable threaded bolts. Due to the fact that the bolt holes are threaded the work piece 16 is rigidly secured to the cylindrical member and is driven thereby. In this form, the tail stock for holding the work piece 16 on the attachment may be dispensed with. It is to be noted that the attachment or fixture may be employed for a work piece having a central countersunk portion of a diameter corresponding to the centering member of the attachment. For each change in the diameter ofthe countersunk portion of the work piece, an attachment having a centering member corresponding thereto must be employed.

With the attachments or fixtures of this invention, work pieces of the type aforementioned may be machined or otherwise fashioned in a simple, efiective, and accurate manner, and in a very short period of time.

Having fully described the invention, what I claim as new and desire to secure by Letters Patent is:

1. An attachment for a lathe comprising a head having a projection extending from a face thereof adapted to be secured to the driving member of a lathe, and a rigid non-expansible centering member of such size as to interfit the counter-sunk portion of a Work piece mounted upon said projection and supported thereby.

2. An attachment for a lathe comprising a head having a projection extending from a face thereof adapted to be secured to the driving member of a lathe, a rigid non-expansible centering member of such size as to interfit the counter-sunk portion of a work piece mounted upon said projection and supported thereby, and means for holding sai centering member in fixed aligned position on said projection.

3. An attachment for a lathe comprising a head having a projection extending from a face thereof adapted to be secured to the driving member of a lathe, a rigid nonexpansible centering member of such size as to interfit the counter-sunk portion of a work piece mounted on said projection and supported thereby, means for holding said centering member in fixed aligned position on said projection, and means for securing the work piece in assembled relation upon said head.

WILLIAM W. BULIFANT. 

